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Finding the Fourth Proportional to 218,800.20, 328,171.14 and 61,015.44

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Solution

The fourth proportional to 218,800.20, 328,171.14 and 61,015.44 is: 91,515.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,800.20 : 328,171.14 = 61,015.44 : x
  2. Step 2: Convert to fraction form
    218,800.20/328,171.14 = 61,015.44/x
  3. Step 3: Cross multiply
    218,800.20x = 328,171.14 × 61,015.44
  4. Step 4: Simplify right side
    218,800.20x = 20,023,506,502.40
  5. Step 5: Solve for x
    x = 20,023,506,502.40/218,800.20
  6. Step 6: Final answer
    x = 91,515.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.